US4530626A - Gear cutter - Google Patents
Gear cutter Download PDFInfo
- Publication number
- US4530626A US4530626A US06/477,737 US47773783A US4530626A US 4530626 A US4530626 A US 4530626A US 47773783 A US47773783 A US 47773783A US 4530626 A US4530626 A US 4530626A
- Authority
- US
- United States
- Prior art keywords
- bedplate
- bar
- block
- axis
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/18—Compensation of tool-deflection due to temperature or force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37096—Invar scale, low temperature coefficient
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49207—Compensate thermal displacement using measured distance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/10—Gear cutting
- Y10T409/101431—Gear tooth shape generating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/303976—Milling with means to control temperature or lubricate
Definitions
- the invention relates to a gear cutter, and more precisely to a gear cutter provided with a device for automatically correcting errors occasioned by the thermal expansion of the bedplate of the machine.
- a hobber comprises a virtually parallelepiped bedplate that supports, placed in alignment one with respect to the other in the direction of the maximum extension of the machine, a block or column, this too virtually parallelepiped, and a rotary table.
- the said block which is supported by the said bedplate in a way in which it is able to slide, is provided in the position facing the rotary table with a plate or slide which, in turn, is vertically smooth running.
- the said slide supports the spindle around which the tool known as the hob, rotates entrusted with the task of cutting a piece carried in rotation around a vertical shaft, supported by the said rotary table.
- the expansion generated by the said heat, sensitive in particular along the longitudinal axis of the bedplate, is the cause of an increase in the distance, measured in a direction perpendicular to the axis of rotation of the piece to be cut, the axis of rotation of the tool is apart from the axis of rotation of the piece to be cut, and therefore, during the time the machine is in operation, of gears being produced with dimensional characteristics that are not rigorously constant.
- the errors resulting from the said expansion are corrected manually.
- the operator carries out a check on the characteristic dimensions of the gears produced.
- the block is registered on the bedplate in such a way as to restore the correct distance in between the axes of the tool and of the piece to be cut, through an operation that causes a considerable amount of time to be wasted.
- the cutting oil passes through a circuit that comprises cooling means (a heat exchanger).
- cooling means a heat exchanger
- the object of the invention is to overcome the problems experienced with the known art, and to do this through the construction of a hobber in which the variations in the distance, caused by the thermal expansion of the bedplate, the axis of the tool is apart from the axis of the piece to be cut, are automatically corrected.
- a gear cutter that comprises a bedplate, a first block mounted on the said bedplate, designed to carry a tool, and a second block mounted on the said bedplate, designed to carry in an axis of rotation a piece to be cut, wherein provision is made for a device for detecting variations, due to the thermal expansion of the bedplate, in the distance the said two blocks are apart, and for drive means interlocked to the said detection device and connected to at least one of the said blocks in order to compensate continuously for the said spacing variation.
- FIG. 1 shows a gear cutter constructed in accordance with the characteristics outlined herein;
- FIG. 2 shows in an enlarged scale, one detail depicted in FIG. 1.
- shown at 1 in its entirety is a hobber, of which a virtually parallelepiped bedplate shown at 2 is part.
- bedplate 2 Above the bedplate 2 are provided two guides 3 (only one of which can be seen in FIG. 1) that run in the longitudinal direction thereof, and by these is supported in a way that allows it to slide, a block or column 4 that is virtually a parallelepiped.
- the column 4 is provided, in the region of one of its walls 5 perpendicular to the plane defined by the guides 3, with two vertical guides 6 (one only of which is illustrated), on which is mounted in a way whereby it is able to move smoothly thereon, a slide 7 that supports a horizontal spindle 8 perpendicular to the said guides 6.
- the said spindle 8 constitutes the axis of rotation of a tool or hob 9.
- the bedplate 2 is integral with a second block or column shown globally at 10, of which is part a rotary table 11, from which extends a vertical shaft 12 that constitutes the axis of rotation of a piece 13 destined to be transformed by the tool 9 into a gear.
- a nozzle directs a jet of cutting oil at the area of interaction in between the tool 9 and the piece 13 to be cut.
- Shown globally at 16 is a detection device constituted by a linear position transducer.
- the said device 16 which comprises a part constituted by a scale or reference element 17 and a part constituted by a pointer or means 18 for reading the scale 17, is able to send a control signal to a motor 19 with which to displace on the guides 3, the column 4 (see also FIG. 2). While the scale 17 is fixed directly to the column 4, the pointer 18 is secured to the bedplate by means of a connection element shown globally at 20.
- the position of the pointer 18 with respect to the scale 17 is indicative of the position of the block 4 on the bedplate 2, and consequently of the distance the axis 8 of the tool 9 is apart from the axis 12 of the piece 13 to be cut.
- the value of the said distance in between the axes 8 and 12 is displayed on a panel 21 to which the detection device 16 is interlocked.
- connection element 20 is constituted by a bar 22 parallel to the guides 3, to a first extremity of which is fixed the pointer 18, and to a second extremity of which is connected, through a bracket 23, one side of the bedplate 2.
- the point at which the bracket 23 is mounted is placed virtually in a plane parallel to the wall 5 that passes through the axis of rotation 12 of the piece 13.
- the bar 22, which in this way passes above the section of the bedplate that is in between the axis of rotation 12 of the piece 13 and the axis of rotation 8 of the tool 9, is made of material of a very low coefficient of thermal expansion.
- the said material can, for example, be an alloy of iron and nickel marketed under the name of NILVAR (M. R.) which, for temperatures not above 100° C., has a linear thermal expansion coefficient of 1.5 ⁇ 10 -6 .
- the bar 22 has a mirror finish so as to oppose the absorption of heat due to radiation, and the full length thereof is protected by a tubular sheath 24.
- a chamber 25 Interposed between the bar 22 and the sheath 24 there is a chamber 25 that communicates with the outside via holes 26 that permit the circulation of air.
- connection element 20 Immediately above the connection element 20 provision is also made for a protection screen 27 in the form of a trough, the purpose of this being to collect the cutting oil and to channel it towards a non-illustrated tank.
- the heat generated by the parts rotating at high speed and the heat yielded by the said cutting oil cause an increase in the temperature of the bedplate 2 and, in consequence, the expansion of this, particularly along the dimension that extends the most.
- the axis of rotation 8 of the tool 9 tends, therefore, to move away, in comparison with the said initial condition, from the axis of rotation 12 of the piece 13 to be cut.
- the said variation in distance manifests itself by a displacement of the pointer 18 with respect to the graduated scale 17, in consequence of the fact that while the pointer 18 is practically fixed to the axis 12 of the piece 13 to be cut, the graduated scale 17 is integral with the column 4.
- the transducer 16 With the displacement of the pointer 18 with respect to the scale 17, the transducer 16 emits an error signal whereby the motor 19 is operated to move the column 4 on the guides 3 in such a way as to restore the initial spacing condition of the axes 8 and 12 or, in other words, to cancel the said error.
Abstract
Description
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT03464/82A IT1156613B (en) | 1982-06-28 | 1982-06-28 | TOOTHING MACHINE |
IT3464A/82 | 1982-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4530626A true US4530626A (en) | 1985-07-23 |
Family
ID=11107863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/477,737 Expired - Fee Related US4530626A (en) | 1982-06-28 | 1983-03-22 | Gear cutter |
Country Status (6)
Country | Link |
---|---|
US (1) | US4530626A (en) |
JP (1) | JPS597535A (en) |
BR (1) | BR8301485A (en) |
DE (1) | DE3309722A1 (en) |
GB (1) | GB2122516B (en) |
IT (1) | IT1156613B (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4619565A (en) * | 1984-05-18 | 1986-10-28 | Gebrueder Heller, Maschinenfabrik Gmbh | Milling machine, especially crankshaft milling machine |
US4714387A (en) * | 1984-11-13 | 1987-12-22 | Nissho Seiko Kabushiki Kaisha | Gear cutting process |
US4728232A (en) * | 1986-02-13 | 1988-03-01 | Maho Aktiengesellschaft | Device for temperature-responsive adjustment of the measuring points of two machine tool parts |
WO1993019876A1 (en) * | 1992-03-31 | 1993-10-14 | Hardinge Brothers, Inc. | Machine and method utilizing thermal compensation |
US5349731A (en) * | 1991-05-07 | 1994-09-27 | Hardinge Brothers, Inc. | Temperature compensated and shock resistant machine tool |
US5421683A (en) * | 1993-06-17 | 1995-06-06 | National Broach & Machine Company | Machine tool with temperature compensation |
WO1997049523A1 (en) * | 1996-06-26 | 1997-12-31 | The Gleason Works | Detecting tool wear by thermal monitoring of workpiece |
US6206621B1 (en) * | 1998-09-09 | 2001-03-27 | The Gleason Works | Apparatus for chip removal |
US6241435B1 (en) * | 1998-03-25 | 2001-06-05 | Vought Aircraft Industries, Inc. | Universal adaptive machining chatter control fixture |
US20040031364A1 (en) * | 2002-08-14 | 2004-02-19 | Fanuc Ltd | Apparatus for preventing chips and/or cutting liquid from being scattered in machine tool |
US20040118457A1 (en) * | 2002-12-23 | 2004-06-24 | Shinsuke Sugata | Method and apparatus for supplying process liquid for machine tool |
CN102151914A (en) * | 2011-01-28 | 2011-08-17 | 陈建文 | Equipment for processing tooth surface of gear |
CN102366845A (en) * | 2011-10-12 | 2012-03-07 | 宁波市鄞州泰盛数控设备有限公司 | Gear processing machine |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4533858A (en) * | 1983-09-16 | 1985-08-06 | Fellows Corporation | Temperature compensation apparatus for gear shapers |
DE3627546C1 (en) * | 1986-08-13 | 1987-11-12 | Maho Ag | Device for compensating the thermal expansion of two relatively movable machine parts |
DE3922177A1 (en) * | 1989-07-06 | 1991-01-17 | Hermle Berthold Maschf Ag | DEVICE FOR COMPENSATING THE HEAT EXPANSION OF MACHINE TOOLS |
EP2821868A1 (en) * | 2013-07-04 | 2015-01-07 | VIGEL S.p.A. | Machine tool provided with a calibration apparatus adapted to compensate for its structural thermal deformation. |
DE102015104289B4 (en) * | 2015-03-23 | 2016-12-15 | Klingelnberg Ag | Method for operating a gear-processing machine |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE146410C (en) * | ||||
GB807109A (en) * | 1955-08-10 | 1959-01-07 | Michigan Tool Co | Quality control apparatus for gear forming and finishing machines |
US3113488A (en) * | 1960-06-24 | 1963-12-10 | Norton Co | Machine tool lead screw |
GB959095A (en) * | 1959-12-14 | 1964-05-27 | Kearney & Trecker Corp | Precision positioning systems |
GB1133225A (en) * | 1965-11-18 | 1968-11-13 | Eastman Kodak Co | Coating compositions |
US3521526A (en) * | 1968-11-18 | 1970-07-21 | Giddings & Lewis | Method and apparatus for positional control compensation for temperature changes in machine tool spindles |
GB1269999A (en) * | 1968-07-17 | 1972-04-12 | Ikegai Iron Works Ltd | An automatic tool position compensating system for a numerically controlled machine tool |
US4100837A (en) * | 1975-12-24 | 1978-07-18 | Norte-Klessmann & Co. K.G. | Temperature compensated measuring device |
US4354404A (en) * | 1979-03-27 | 1982-10-19 | Innocenti Santeustacchio S.P.A. | Arrangement for increasing the precision of a machine tool |
JPS57178625A (en) * | 1981-04-27 | 1982-11-02 | Mitsubishi Heavy Ind Ltd | Correcting method of thermal deformation in machine tool |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD70474A (en) * | ||||
DE717730C (en) * | 1938-03-31 | 1942-02-20 | Genevoise Instr Physique | Spindle bearing for tool spindles, especially for grinding spindles |
US3347116A (en) * | 1965-02-23 | 1967-10-17 | Pratt & Whitney Inc | Automatic measuring lead screw compensator |
DE2450322C3 (en) * | 1974-10-23 | 1978-05-18 | Friedrich Deckel Ag, 8000 Muenchen | Device for compensating the thermal expansion of a machine tool part |
-
1982
- 1982-06-28 IT IT03464/82A patent/IT1156613B/en active
-
1983
- 1983-03-16 GB GB08307221A patent/GB2122516B/en not_active Expired
- 1983-03-18 DE DE19833309722 patent/DE3309722A1/en not_active Ceased
- 1983-03-22 US US06/477,737 patent/US4530626A/en not_active Expired - Fee Related
- 1983-03-23 BR BR8301485A patent/BR8301485A/en not_active IP Right Cessation
- 1983-06-08 JP JP58101055A patent/JPS597535A/en active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE146410C (en) * | ||||
GB807109A (en) * | 1955-08-10 | 1959-01-07 | Michigan Tool Co | Quality control apparatus for gear forming and finishing machines |
GB959095A (en) * | 1959-12-14 | 1964-05-27 | Kearney & Trecker Corp | Precision positioning systems |
US3113488A (en) * | 1960-06-24 | 1963-12-10 | Norton Co | Machine tool lead screw |
GB1133225A (en) * | 1965-11-18 | 1968-11-13 | Eastman Kodak Co | Coating compositions |
GB1269999A (en) * | 1968-07-17 | 1972-04-12 | Ikegai Iron Works Ltd | An automatic tool position compensating system for a numerically controlled machine tool |
US3521526A (en) * | 1968-11-18 | 1970-07-21 | Giddings & Lewis | Method and apparatus for positional control compensation for temperature changes in machine tool spindles |
US4100837A (en) * | 1975-12-24 | 1978-07-18 | Norte-Klessmann & Co. K.G. | Temperature compensated measuring device |
US4354404A (en) * | 1979-03-27 | 1982-10-19 | Innocenti Santeustacchio S.P.A. | Arrangement for increasing the precision of a machine tool |
JPS57178625A (en) * | 1981-04-27 | 1982-11-02 | Mitsubishi Heavy Ind Ltd | Correcting method of thermal deformation in machine tool |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4619565A (en) * | 1984-05-18 | 1986-10-28 | Gebrueder Heller, Maschinenfabrik Gmbh | Milling machine, especially crankshaft milling machine |
US4714387A (en) * | 1984-11-13 | 1987-12-22 | Nissho Seiko Kabushiki Kaisha | Gear cutting process |
US4728232A (en) * | 1986-02-13 | 1988-03-01 | Maho Aktiengesellschaft | Device for temperature-responsive adjustment of the measuring points of two machine tool parts |
US5349731A (en) * | 1991-05-07 | 1994-09-27 | Hardinge Brothers, Inc. | Temperature compensated and shock resistant machine tool |
WO1993019876A1 (en) * | 1992-03-31 | 1993-10-14 | Hardinge Brothers, Inc. | Machine and method utilizing thermal compensation |
US5303458A (en) * | 1992-03-31 | 1994-04-19 | Hardinge Brothers, Inc. | Method and apparatus for detecting and compensating thermal growth in machine tools |
US5421683A (en) * | 1993-06-17 | 1995-06-06 | National Broach & Machine Company | Machine tool with temperature compensation |
US5904457A (en) * | 1996-06-26 | 1999-05-18 | The Gleason Works | Detecting tool wear by thermal monitoring of workpiece |
WO1997049523A1 (en) * | 1996-06-26 | 1997-12-31 | The Gleason Works | Detecting tool wear by thermal monitoring of workpiece |
US6241435B1 (en) * | 1998-03-25 | 2001-06-05 | Vought Aircraft Industries, Inc. | Universal adaptive machining chatter control fixture |
US6206621B1 (en) * | 1998-09-09 | 2001-03-27 | The Gleason Works | Apparatus for chip removal |
US20040031364A1 (en) * | 2002-08-14 | 2004-02-19 | Fanuc Ltd | Apparatus for preventing chips and/or cutting liquid from being scattered in machine tool |
US7128505B2 (en) * | 2002-08-14 | 2006-10-31 | Fanuc Ltd. | Apparatus for preventing chips and/or cutting liquid from being scattered in machine tool |
US20040118457A1 (en) * | 2002-12-23 | 2004-06-24 | Shinsuke Sugata | Method and apparatus for supplying process liquid for machine tool |
US6938633B2 (en) * | 2002-12-23 | 2005-09-06 | Horkos Corp. | Method and apparatus for supplying process liquid for machine tool |
CN102151914A (en) * | 2011-01-28 | 2011-08-17 | 陈建文 | Equipment for processing tooth surface of gear |
CN102151914B (en) * | 2011-01-28 | 2013-02-13 | 陈建文 | Equipment for processing tooth surface of gear |
CN102366845A (en) * | 2011-10-12 | 2012-03-07 | 宁波市鄞州泰盛数控设备有限公司 | Gear processing machine |
CN102366845B (en) * | 2011-10-12 | 2013-11-27 | 宁波市鄞州泰盛数控设备有限公司 | Gear processing machine |
Also Published As
Publication number | Publication date |
---|---|
JPS597535A (en) | 1984-01-14 |
GB2122516A (en) | 1984-01-18 |
DE3309722A1 (en) | 1983-12-29 |
IT8203464A0 (en) | 1982-06-28 |
IT1156613B (en) | 1987-02-04 |
GB8307221D0 (en) | 1983-04-20 |
GB2122516B (en) | 1986-10-15 |
BR8301485A (en) | 1984-06-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CIMA S.P.A. , VIA TOSARELLI, 340 -VILLANOVA DI CAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SABBIONI, CESARE;REEL/FRAME:004134/0769 Effective date: 19830308 Owner name: CIMA S.P.A. , VIA TOSARELLI, 340 -VILLANOVA DI CAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SABBIONI, CESARE;REEL/FRAME:004134/0769 Effective date: 19830308 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19930725 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |